gramma's dog

It usually doesnt take long during a visit with my gramma until i am trying to get her dog alone. The dog licks genitals, you dont have to encourage it at all, he just goes for them automatically and with incredible enthusiasm. He even wants more once I cum and he licks it all up. I am getting horny now thinking about it. Also, i once put my mouth on his penis on an attempt to suck him off but he didnt let me.